CN106840994B - A kind of experimental provision and method of flow in low permeability core horizontal joint seepage flow field recognition - Google Patents
A kind of experimental provision and method of flow in low permeability core horizontal joint seepage flow field recognition Download PDFInfo
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- CN106840994B CN106840994B CN201611179885.1A CN201611179885A CN106840994B CN 106840994 B CN106840994 B CN 106840994B CN 201611179885 A CN201611179885 A CN 201611179885A CN 106840994 B CN106840994 B CN 106840994B
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- horizontal joint
- clamper
- core
- test point
- flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The present invention relates to the determination techniques fields of rock core seepage field, disclose the experimental provision and method of a kind of flow in low permeability core horizontal joint seepage flow field recognition.The experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the present invention includes clamper and artificial core, wherein is provided at least one horizontal joint on artificial core, and is connected with several test points.Pressure distribution and flow rate test in flow event may be implemented in the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the present invention, and then determines flow in low permeability core horizontal joint seepage flow mechanism.
Description
Technical field
The present invention relates to the determination techniques field of rock core seepage field more particularly to a kind of flow in low permeability core horizontal joint seepage fields
The experimental provision and method of measurement.
Background technique
Straight well exploitation low-permeability oil deposit generally requires pressure break, and the crack that pressure break is formed mainly is parallel to the vertical of pit shaft
Seam, domestic and foreign scholars have been carried out numerous studies to the Seepage problems of vertical pressure-break.But in recent years, some shallow-layers in China are low
In the development process of permeability hiding, the problem of encountering horizontal fracture when oil reservoir buried depth is shallower or oil breakdown pressure gradient is smaller.
Both at home and abroad the Seepage problems of horizontal joint are studied also seldom, by document and patent retrieval, at present for the research of horizontal joint
Be based only on the analysis of simple Well Testing Theory or numerical simulation, still lack pressure break horizontal joint seepage field distribution test method and
Experimental provision.
Summary of the invention
(1) technical problems to be solved
The present invention provides the experimental provision and method of a kind of flow in low permeability core horizontal joint seepage flow field recognition, to solve hyposmosis
The seepage flow forecasting problem of generated horizontal joint after oil reservoir pressure break, provide in a kind of testing level seam flow event pressure distribution and
The device and method of flow rate test, so that research level be facilitated to stitch seepage flow mechanism.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides a kind of experiments of flow in low permeability core horizontal joint seepage flow field recognition
Device, including
Artificial core, is at least arranged a horizontal joint on the side on the artificial core, corresponding on the artificial core
The horizontal joint is provided with the oil well pipe being connected to the horizontal joint, and several test points are provided on the artificial core, described
Connecting test pipeline in test point, the test line are sealed far from one end of the artificial core；
Clamper, the artificial core are arranged in the clamper, and the clamper and the artificial core are not set
The side of horizontal joint forms the sealing space that pressure oil is surveyed in accommodating, and the sealed end of the test line passes through the side wall of the clamper
It extends on the outside of clamper, the part that the test line is located on the outside of the clamper is connected with pressure sensor, the oil
The oil outlet pipe of well casing passes through the side wall of the clamper, and oil outlet pipe is provided with flow on the exterior portion of clamper
Meter.
Further, the artificial core is cuboid-type, and the artificial core length and width is equal, the clamper
For barrel shape structure.
Further, the artificial core be successively above and below three-decker, respectively first layer, the second layer, third layer,
The horizontal joint is arranged on the second layer, and the horizontal joint is two straight line sides and two straight lines by horizontal vertical intersection
Curve between side surrounds.
Further, for the intersection point of two straight line sides on a vertical side of artificial core, the oil well pipe is perpendicular
Directly it is arranged on the vertical side of two straight line sides intersection.
Further, the first layer of the artificial core, the second layer, be respectively arranged with 3 test points in third layer, it is described
Three test points of first layer are respectively the first test point, the second test point, third test point, and are arranged at the height of first layer
The intermediate position in direction is spent, the horizontal two-dimension coordinate of the first test point is (L/2+Fx/2, Fy+1.5), the level of the second test point
Two-dimensional coordinate is (Fx/2, Fy/2-0.75), and the horizontal two-dimension coordinate of third test point is (Fx/2-1.5, Fy/2)；
Three test points of the second layer are respectively the 4th test point, the 5th test point, the 6th test point, and are respectively provided with
At the intermediate position of the second layer short transverse, the 4th test point is arranged in the underface of the first test point, and described
The underface of the second test point is arranged in five test points, and the planar two dimensional coordinate of the 6th test point is (Fx, L/2+Fy/2)；
Three test points of the third layer are respectively the 7th test point, the 8th test point, the 9th test point, and are respectively provided with
In the middle position of the third layer short transverse, the 7th test point is arranged in the underface of the first test point, and described
The underface of the second test point is arranged in eight test points, and the underface of third test point is arranged in the 9th test point；
Above-mentioned planar two dimensional coordinate with the vertical side where the intersection point of two straight line sides of artificial core is x, y-axis
Position where origin, the forward direction of x-axis are extending direction of the wherein straight line in artificial core of horizontal joint, the forward direction of y-axis
For extending direction of the another straight line on artificial core, the equal length and width of artificial core is L, and Fx is x-axis direction
The length of the straight line of horizontal joint, Fy are the length of the straight line of the horizontal joint in y-axis direction.
Further, x-axis to horizontal joint length be greater than y-axis to horizontal joint length.
Further, it is also connected with vacuum pump, twin cylinder pump on the upper surface side wall of the clamper, the vacuum pump is used for
Vacuum environment will be formed in clamper, the twin cylinder pump is used for the injection pressurization oil into the clamper.
Further, the length and width of the artificial core is 20cm, and the height of the artificial core is 10cm, institute
The internal diameter for stating clamper is 33cm, and the height of the clamper is 30cm, Fx 5cm, Fy 3.5cm.
Further, the artificial core is suppressed by particle and cementing agent, the grain of the particle at the horizontal joint
Diameter is greater than the partial size at other positions of artificial core, and other positions of permeability ratio artificial core between the particle of horizontal joint position
Greatly at least 1000 times of permeability.
The present invention also provides a kind of flow in low permeability core horizontal joint seepage field methods for measuring: specific step is as follows:
Step 1: the artificial core with horizontal joint is placed in clamper, the test point of artificial core and end portion is close
The test line of envelope connects, and connects vertical oil well pipe in the horizontal joint position of artificial core, and guarantee that artificial core is not set
The side of horizontal joint and the clamper form the sealing space that pressure oil is surveyed in accommodating；
Step 2: surveying pressure oil using the sealing space injection of survey pressure oil of the vacuum pump into clamper, survey pressure oil by artificial
Rock core infiltration forms oily saturation state full of test line, and is maintained the state 24 hours or more using vacuum pump negative pressure；
Step 3: removing vacuum pump, connect pressure sensor in the end of test line, connected on the side wall of clamper
Flowmeter is arranged in the oil outlet pipe of oil well pipe in twin cylinder pump；
Step 4: surveying pressure oil using the sealing space injection of survey pressure oil of the twin cylinder pump into clamper, and maintain in clamper
Survey pressure oil pressure after the first scheduled pressure value, flowmeter stability of flow constant after the numerical value of each pressure sensor, record
The number pressure of each pressure sensor and the flow value of flowmeter；
Step 5: changing the pressure for surveying pressure oil in clamper using twin cylinder pump, repeat the above steps 4；
Step 6: using number pressure and flow value analysis seepage field the pressure distribution of record, determining seepage flow mechanism.
(3) beneficial effect
Above-mentioned technical proposal of the invention has the advantages that
The experimental provision and method of a kind of flow in low permeability core horizontal joint seepage flow field recognition provided by the invention are for hypotonic
Form the Seepage problems of horizontal fractures seam after saturating oil reservoir pressure break, the method for a set of test seepage field designed, and according to being mentioned
Method out designs and produces out a set of horizontal joint seepage field experimental provision.Flow in low permeability core horizontal joint seepage flow field recognition of the present invention
Experimental provision pressure distribution and flow rate test may be implemented in horizontal joint flow event, and then determine flow in low permeability core horizontal joint
Seepage flow mechanism.
In addition to it is described above present invention solves the technical problem that, constitute technical solution technical characteristic and have this
Except advantage brought by the technical characteristic of a little technical solutions, other technical characteristics of the invention and these technical characteristic brings
Advantage will be further illustrated in conjunction with attached drawing.
Detailed description of the invention
Fig. 1 is the schematic diagram of the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the embodiment of the present invention；
Fig. 2 is the signal of the artificial core of the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the embodiment of the present invention
Figure；
Fig. 3 is the first layer test point of the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the embodiment of the present invention
Horizontal two-dimension arrangement schematic diagram；
Fig. 4 is the second layer test point of the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the embodiment of the present invention
Horizontal two-dimension arrangement schematic diagram；
Fig. 5 is the third layer test point of the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the embodiment of the present invention
Horizontal two-dimension arrangement schematic diagram.
In figure: 1: artificial core, 11: first layer, 12: the second layer, 13: third layer；2: horizontal joint；3: clamper；4: oil
Well casing；5: pressure gauge；6: vacuum pump；7: test line；8: pressure sensor.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In addition, in the description of the present invention, unless otherwise indicated, " multiple ", " more ", " multiple groups " be meant that two or
Two or more, " several ", " several ", " several groups " are meant that one or more.
As shown in Figure 1, a kind of experimental provision of flow in low permeability core horizontal joint seepage flow field recognition provided in an embodiment of the present invention,
Including artificial core 1 and clamper 3.
Wherein, as shown in Fig. 2, a horizontal joint 2, the artificial rock is at least arranged on side on the artificial core 1
The horizontal joint 2 is corresponded on the heart 1 and is provided with the oil well pipe 4 being connected to the horizontal joint 2, if being provided on the artificial core 2
Test point is done, is connected with test line 7 in the test point.The one end of test line 7 far from artificial core is sealed end, test
One end that pipeline is connect with the test point can receive the test oil infiltrated from artificial core test point position.
The artificial core 1 is arranged in the clamper 3, the clamper 3 and the not set level of the artificial core 1
The side of seam forms the sealing space that pressure oil is surveyed in accommodating, and the side wall that the sealed end of the test line 7 passes through the clamper 3 prolongs
It reaches on the outside of clamper, the part that the test line 7 is located at 3 outside of clamper is connected with pressure sensor 8, the oil
The oil outlet pipe of well casing 4 passes through the side wall of the clamper 3, and oil outlet pipe is provided with flow on the exterior portion of clamper
Meter.
The experimental provision of the present embodiment flow in low permeability core horizontal joint seepage flow field recognition is seeped using artificial core 1 as horizontal joint
The research model in flow field, and cooperate the experimental situation of 3 simulation core of clamper, during specific experiment, accommodating is surveyed in advance
It is full of kerosene in the sealing space of pressure oil and promotes to be saturated kerosene in test line 7 by less permeable layer, and maintains this saturation
Environment for a period of time, to really simulate the oil storage environment of rock core horizontal joint.It is impregnated to artificial core 1 and completes to reach true
After oil storage environment, pressurize into clamper 3, pressure environment when realizing fuel-displaced, and each test is measured by pressure sensor 8
The pressure value of pipeline is measured flow value by flow measurement, and then passes through these analysis of experimental data seepage fields.
As it can be seen that the experimental provision of the present embodiment flow in low permeability core horizontal joint seepage flow field recognition can be stitched accurately dummy level
Seepage environment, it is possible to which the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition obtains accurate ginseng through this embodiment
Number, so as to analyze the parameter of the horizontal joint seepage field in prediction actual production.
As a kind of implementation, as shown in Fig. 2, the artificial core 1 is cuboid-type, the artificial core length and
Width is equal, the clamper 3 of corresponding optional barrel shape.
As a kind of preferable dimensional fits, the value of the available length and width L of the artificial core 1 is 20cm,
The height h3 of the artificial core is 10cm, and the internal diameter of the clamper is 33cm, and the height of the clamper is 30cm.In reality
In the application of border, clamper can be process by stainless steel, pressure-resistant 16MPa.
As shown in Fig. 2, the artificial core 1 is successively upper and lower three-decker, respectively as a kind of alternative embodiment
First layer 11, the second layer 12, third layer 13, the thickness h 4 of first layer 11 are 7.5cm, and the thickness h 5 of the second layer 12 is 1cm, third
The thickness h 6 of layer 13 is 1.5cm, and the horizontal joint 2 is arranged on the second layer 12, and the horizontal joint 2 is intersected by horizontal vertical
Two straight line sides and two straight line sides between curve surround.
It is suppressed by the skeleton particle of different particle size distribution with cementing agent specifically, artificial core 1 can be, institute
The partial size for stating the skeleton particle at horizontal joint 2 is greater than the partial size at other positions of artificial core, and the skeleton particle of 2 position of horizontal joint
Between greatly at least 1000 times of permeability of other positions of permeability ratio artificial core.Such as form the skeleton particle of horizontal joint 2
Partial size be 1d in x, y plane and short transverse, the skeleton particle of part namely hyposmosis part except horizontal joint 2
Width, length 1md on x, y plane, the height of particle are 0.2md.
The horizontal joint of the artificial core 1 of the experimental provision of the present embodiment flow in low permeability core horizontal joint seepage flow field recognition is to pass through
Relatively large particle is formed between hyposmosis particle, and processing technology is simple, is easy to make and obtain.
As shown in Fig. 2, implementation as one preferred, the intersection point of two straight line sides of horizontal joint 2 is in artificial rock
On one vertical side of the heart, the oil well pipe 4 is arranged at the vertical lateral location of two straight line sides intersection.It is such
Position setting is best suitable for the case where actual production horizontal joint occurs, and preferably determines a kind of preferred embodiment of test point.
As shown in Fig. 3,4,5, with the vertical straight line where the intersection point of two straight line sides of artificial core as z-axis,
That is z-axis zero point (origin) position for being x, y-axis, using the straight line of wherein horizontal joint artificial core extending direction as x-axis,
Using extending direction of the another straight line on artificial core as y-axis, three-dimensional system of coordinate is established, (namely horizontal plane is x, y two dimension seat
Mark plane), the equal length and width of artificial core is L, and Fx is the length of the straight line of the x-axis direction of horizontal joint 2, and Fy is level
The length of the straight line in the y-axis direction of seam 2.
The first layer 11 of the artificial core 1, the second layer 12 are respectively arranged with 3 test points in third layer 13, and described
One layer of three test points are respectively the first test point A, the second test point B, third test point C, and are arranged at first layer
The intermediate position of short transverse, the horizontal two-dimension coordinate of the first test point A are (L/2+Fx/2, Fy+1.5), the second test point B's
Horizontal two-dimension coordinate is (Fx/2, Fy/2-0.75), and the horizontal two-dimension coordinate of third test point C is (Fx/2-1.5, Fy/2).
Three test points of the second layer 12 are respectively the 4th test point D, the 5th test point E, the 6th test point F, and
Be arranged at the intermediate position of the second layer short transverse, the 4th test point D be arranged in the first test point A just under
The underface of the second test point B is arranged in side, the 5th test point E, and the planar two dimensional coordinate of the 6th test point F is
(Fx, L/2+Fy/2).
Three test points of the third layer 13 are respectively the 7th test point G, the 8th test point H, the 9th test point I, and
Be arranged at the middle position of the third layer short transverse, the 7th test point G be arranged in the first test point A just under
The underface of the second test point B is arranged in side, the 8th test point H, and the 9th test point I is arranged in third test point C
Underface.
Alternatively, x-axis to horizontal joint length be greater than y-axis to horizontal joint length, specific
In embodiment, the size of corresponding above-mentioned artificial core, Fx length is 5cm, and Fy length is 3.5cm, such first test point, the
Seven test points, the 4th test point horizontal two-dimension plane coordinates be (12.5,5), the second test point, the 5th test point, the 8th survey
The horizontal two-dimension coordinate of pilot be (2.5,1) third test point, the 9th test point horizontal two-dimension plane coordinates be (1,
1.75), the horizontal two-dimension plane coordinates of the 6th test point is (5,11.75).Wherein, the unit of above-mentioned each symbol and coordinate is
Centimetre.
The experimental provision of the present embodiment flow in low permeability core horizontal joint seepage flow field recognition selects representative survey to press from three-dimensional
Point lays the foundation to be better understood by the distribution of hyposmosis horizontal joint seepage flow.
As a preferred embodiment, vacuum pump, twin cylinder pump 6 are also connected on the upper surface side wall of the clamper 3, it is described
Vacuum pump is used for the injection pressurization oil into the clamper for will form vacuum environment, the twin cylinder pump in clamper.
The experimental provision of the present embodiment flow in low permeability core horizontal joint seepage flow field recognition, is infused in cylindrical rock core clamper 3
Full test kerosene, twin cylinder pump 6 apply seepage pressure by the pipeline of cylindrical rock core clamper upper cover in kerosene, the pressure
By horizontal joint seepage flow rock core, for oil from producing well output, the pipeline 7 by being connected to producing well passes through cylindrical rock core clamper 3
Side wall is connected to flowmeter, metering exudation flow；The pressure sensor 8 that this actual load is set can be high-precision pressure sensor, high
The pressure that accuracy pressure sensor measures is shown pressure on a display screen, and be stored in by Data collecting conversion system
In case subsequent processing in computer.Label 5 is pressure gauge in Fig. 1, for measuring kerosene that twin cylinder pump is applied in clamper
Pressure.
The embodiment of the invention also provides a kind of experimental provisions using above-mentioned flow in low permeability core horizontal joint seepage flow field recognition
Flow in low permeability core horizontal joint seepage field method for measuring:
Step 1: the artificial core with horizontal joint is placed in clamper, the test point of artificial core and end portion is close
The test line of envelope connects, and connects vertical oil well pipe in the horizontal joint position of artificial core, guarantees the not set water of artificial core
The side of flush joint and the clamper form the sealing space that pressure oil is surveyed in accommodating；
Step 2: surveying pressure oil using the sealing space injection of survey pressure oil of the vacuum pump into clamper, survey pressure oil by artificial
Rock core infiltration is full of test line, and utilizes the maintenance of vacuum pump negative pressure 24 hours or more；
Step 3: removing vacuum pump, connect pressure gauge in the end of test line, connect twin-tub on the side wall of clamper
Pump, is arranged flowmeter in the oil outlet pipe of oil well pipe；
Step 4: surveying pressure oil using the sealing space injection of survey pressure oil of the twin cylinder pump into clamper, and maintain in clamper
The pressure of survey pressure oil record each pressure after each pressure gauge numerical value after constant, flowmeter stability of flow in the first scheduled pressure value
The number pressure of meter and the flow value of flowmeter；
Step 5: changing pressure using twin cylinder pump, make the pressure change of the survey pressure oil in clamper, repeat the above steps 4；
Step 6: using number pressure and flow value analysis seepage field the pressure distribution of record, determining seepage flow mechanism.
Wherein, in above-mentioned steps 4 and 5, twin cylinder pump provide pressure can be 0.65MPa, 0.55MPa, 0.40MPa,
0.35MPa.This pressure value is value most commonly seen to the pressure of horizontal joint generation in practical applications, so simulating these
Pressure value can obtain and practical immediate horizontal joint seepage field.
In conclusion the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition of the present invention and the seepage pressure of method are
It is transmitted by liquid, the pressure of twin cylinder pump is applied in liquid oil by the pipeline of core holding unit upper cover, normal compared to existing
The Seepage Experiment of rule means is by laterally applying confining pressure, and in the mode for axially applying driving pressure, pressure of the invention is place
Place is uniform；And producing well is connected to atmosphere by pipeline, being equivalent to bottom pressure is approximately an atmospheric pressure, so meeting reality
The environmental condition of production level seam and extracting device of oil obtains horizontal joint seepage flow so as to device and method through the invention
The accurate analysis data of field.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of experimental provision of flow in low permeability core horizontal joint seepage flow field recognition, it is characterised in that: including
Artificial core, is at least arranged a horizontal joint on the side on the artificial core, it is corresponding on the artificial core described in
Horizontal joint is provided with the oil well pipe being connected to the horizontal joint, and several test points, the test are provided on the artificial core
Connecting test pipeline on point, the test line are sealed far from one end of the artificial core；
Clamper, the artificial core are arranged in the clamper, the clamper and the not set level of the artificial core
The side of seam forms the sealing space that pressure oil is surveyed in accommodating, and the side wall that the sealed end of the test line passes through the clamper extends
On the outside of to clamper, the part that the test line is located on the outside of the clamper is connected with pressure sensor, the oil well pipe
Oil outlet pipe pass through the side wall of the clamper, and oil outlet pipe is provided with flowmeter on the exterior portion of clamper.
2. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 1, it is characterised in that: described
Artificial core is cuboid-type, and the artificial core length and width is equal, and the clamper is barrel shape structure.
3. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 2, it is characterised in that: described
Artificial core is successively upper and lower three-decker, respectively first layer, the second layer, third layer, and the horizontal joint is arranged second
On layer, and the horizontal joint be by horizontal vertical intersection two straight line sides and two straight line sides between curve surround.
4. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 3, it is characterised in that: two
For the intersection point of straight line side on a vertical side of artificial core, the oil well pipe is vertically arranged in two straight line side phases
On the vertical side handed over.
5. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 4, it is characterised in that: described
The first layer of artificial core, the second layer are respectively arranged with 3 test points, three test points point of the first layer in third layer
Not Wei the first test point, the second test point, third test point, and be arranged at the intermediate position of the short transverse of first layer,
The horizontal two-dimension coordinate of one test point is (L/2+Fx/2, Fy+1.5), and the horizontal two-dimension coordinate of the second test point is (Fx/2, Fy/
2-0.75), the horizontal two-dimension coordinate of third test point is (Fx/2-1.5, Fy/2)；
Three test points of the second layer are respectively the 4th test point, the 5th test point, the 6th test point, and are arranged at institute
The intermediate position of second layer short transverse is stated, the underface of the first test point is arranged in the 4th test point, and the described 5th surveys
The underface of the second test point is arranged in pilot, and the planar two dimensional coordinate of the 6th test point is (Fx, L/2+Fy/2)；
Three test points of the third layer are respectively the 7th test point, the 8th test point, the 9th test point, and are arranged at institute
The middle position of third layer short transverse is stated, the underface of the first test point is arranged in the 7th test point, and the described 8th surveys
The underface of the second test point is arranged in pilot, and the underface of third test point is arranged in the 9th test point；
Above-mentioned planar two dimensional coordinate with the vertical side where the intersection point of two straight line sides of artificial core is x, the origin of y-axis
The position at place, the forward direction of x-axis are extending direction of the wherein straight line in artificial core of horizontal joint, and the forward direction of y-axis is another
Extending direction of the straight line on artificial core, the equal length and width of artificial core is L, and Fx is the level of x-axis direction
The length of the straight line of seam, Fy are the length of the straight line of the horizontal joint in y-axis direction.
6. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 5, it is characterised in that: x-axis
To horizontal joint length be greater than y-axis to horizontal joint length.
7. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 1, it is characterised in that: described
Vacuum pump, twin cylinder pump are also connected on the upper surface side wall of clamper, the vacuum pump is for will form vacuum ring in clamper
Border, the twin cylinder pump are used for the injection pressurization oil into the clamper.
8. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 5, it is characterised in that: described
The length and width of artificial core is 20cm, and the height of the artificial core is 10cm, and the internal diameter of the clamper is 33cm,
The height of the clamper is 30cm, Fx 5cm, Fy 3.5cm.
9. the experimental provision of flow in low permeability core horizontal joint seepage flow field recognition according to claim 3, it is characterised in that: described
Artificial core is suppressed by particle and cementing agent, and the partial size of the particle at the horizontal joint is greater than other positions of artificial core
Partial size, and greatly at least 1000 times of the permeability at other positions of permeability ratio artificial core between the particle of horizontal joint position.
10. a kind of flow in low permeability core horizontal joint seepage field method for measuring, it is characterised in that:
Step 1: the artificial core with horizontal joint being placed in clamper, the test point of artificial core and end portion are sealed
Test line connection, connects vertical oil well pipe in the horizontal joint position of artificial core, and guarantee the not set level of artificial core
The side of seam and the clamper form the sealing space that pressure oil is surveyed in accommodating；
Step 2: surveying pressure oil using the sealing space injection of survey pressure oil of the vacuum pump into clamper, survey pressure oil and pass through artificial core
Infiltration forms oily saturation state full of test line, and is maintained the state 24 hours or more using vacuum pump negative pressure；
Step 3: removing vacuum pump, connect pressure sensor in the end of test line, connect twin-tub on the side wall of clamper
Pump, is arranged flowmeter in the oil outlet pipe of oil well pipe；
Step 4: surveying pressure oil using the sealing space injection of survey pressure oil of the twin cylinder pump into clamper, and maintain the survey in clamper
The pressure of pressure oil records each pressure after the first scheduled pressure value, flowmeter stability of flow constant after the numerical value of each pressure sensor
The number pressure of force snesor and the flow value of flowmeter；
Step 5: changing the pressure for surveying pressure oil in clamper using twin cylinder pump, repeat the above steps 4；
Step 6: using number pressure and flow value analysis seepage field the pressure distribution of record, determining seepage flow mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611179885.1A CN106840994B (en) | 2016-12-19 | 2016-12-19 | A kind of experimental provision and method of flow in low permeability core horizontal joint seepage flow field recognition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611179885.1A CN106840994B (en) | 2016-12-19 | 2016-12-19 | A kind of experimental provision and method of flow in low permeability core horizontal joint seepage flow field recognition |
Publications (2)
| Publication Number | Publication Date |
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| CN106840994A CN106840994A (en) | 2017-06-13 |
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| CN102809528A (en) * | 2012-08-03 | 2012-12-05 | 中国石油天然气股份有限公司 | Three-phase relative permeability testing system based on CT (computed tomography) scanning |
| CN104819921A (en) * | 2015-04-23 | 2015-08-05 | 绍兴文理学院 | Large-size rock fracture permeability test system and measuring method thereof |
| CN105388098A (en) * | 2015-12-20 | 2016-03-09 | 湖南科技大学 | Rock fracture preparation and seepage device and seepage characteristic test method |
| CN205138977U (en) * | 2015-11-26 | 2016-04-06 | 中国石油化工股份有限公司 | A jumbo size rock core holder for radial flow experiment |
| CN105928858A (en) * | 2016-07-06 | 2016-09-07 | 西南交通大学 | Method for testing indoor seepage of large-size irregular undisturbed fractured rock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102809528A (en) * | 2012-08-03 | 2012-12-05 | 中国石油天然气股份有限公司 | Three-phase relative permeability testing system based on CT (computed tomography) scanning |
| CN104819921A (en) * | 2015-04-23 | 2015-08-05 | 绍兴文理学院 | Large-size rock fracture permeability test system and measuring method thereof |
| CN205138977U (en) * | 2015-11-26 | 2016-04-06 | 中国石油化工股份有限公司 | A jumbo size rock core holder for radial flow experiment |
| CN105388098A (en) * | 2015-12-20 | 2016-03-09 | 湖南科技大学 | Rock fracture preparation and seepage device and seepage characteristic test method |
| CN105928858A (en) * | 2016-07-06 | 2016-09-07 | 西南交通大学 | Method for testing indoor seepage of large-size irregular undisturbed fractured rock |
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